elbaradei served for more than a decade as director-general of the international atomic energy agency and in 2005, he was awarded the nobel peace prize, which he shared with the iaea. >>> meanwhile the political uncertainty in egypt has put the obama administration in a very difficult situation. should the u.s. cut aid to egypt or not? republican senator john mccain says yes. >> we cannot repeat the same mistakes that we made at other times in our history by supporting the removal of freely elected governments, and so i believe the aid has to be suspended, that the egyptian military has to set a timetable for elections and a new constitution, and then we should evaluate whether to continue the aid or not. >> as news of mohamed elbaradei's appointment as interim prime minister reaches egyptians, thousands of supporters have deposed mohamed morsi are protesting in cairo. our senior international correspondent ben wedeman is live in cairo. ben, what more do you know about that situation and the swearing in? >> reporter: well we know it's going to take place tonight. we're already hearing